Malicious PDF — malware analysis report

Static analysis result for SHA-256 000ca305a56eab5d…

MALICIOUS

PDF

73.1 KB Created: 2021-04-01 21:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7771621ac873ec20336764574ed60823 SHA-1: 541149d32bac017ffd955b6ba316a672960d2b1b SHA-256: 000ca305a56eab5db5d4181a3d7de3e39bde451f0ca2fbed222c030e076abfec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lead users to phishing or malware download sites. The embedded link `https://crophysi.ru/strik?utm_term=zagg+keyboard+ipad+mini+1` is flagged as a known malicious redirector. The ClamAV detection and ML classifier further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=zagg+keyboard+ipad+mini+1 In PDF document text
    • http://a1metromovers.com/nuwebovutiv48i.pdfIn PDF document text
    • http://belplitka.ru/confirmatory_due_diligence_report5j8wq.pdfIn PDF document text
    • http://tujozavido.66ghz.com/mbti_test_results.pdfIn PDF document text
    • http://denizan.com/instagram_appeal_promotioncel95.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/recommended_diet_after_gallbladder_surgery.pdfIn PDF document text
    • http://totalcreditreport.info/plautus_amphitryoni1kv6.pdfIn PDF document text
    • http://luminar4-download.xyz/90663104469z7xgh.pdfIn PDF document text
    • http://5gusevshop.space/how_to_get_unlimited_money_in_simcity_buildit4p9sd.pdfIn PDF document text
    • http://cg-designer.xyz/899759684424zgho.pdfIn PDF document text
    • http://kpovli.ru/excel_beginner_to_advanced7rmd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/5166810090.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/1068635306.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/stress_echo_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/ge_caddx_nx-8_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/classifying_societies_ielts_reading_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/65651741660.pdfIn PDF document text
    • http://xidatozekef.epizy.com/38153670637.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/35555941778.pdfIn PDF document text
    • http://redariwim.rf.gd/56124294728.pdfIn PDF document text
    • http://vibizif.epizy.com/concrete_and_abstract_nouns_exercises_with_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5384 bytes
SHA-256: a6e0aa03b172d0640f324c2972b3532b275680a31915bada3ff6e7d1dc2b22b8
font_01_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 10796 bytes
SHA-256: 7330e3b18ef4b73ca6bf1b4f996364dca02540ba7d6e3281f5d9c81fc2980ae3

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